One vertex per element, one color per generator, with an edge from x to x·s.
(9,10,15,13)(11,17,12,16)(14,18,22,21)(19,24,20,23)(25,26)(27,28)(29,32)(30,33)(31,34)(35,36)(37,39)(38,40)(1,2)(3,6)(4,7)(5,8)(9,11,15,12)(10,16,13,17)(14,19,22,20)(18,23,21,24)(25,27,32,30)(26,33,29,28)(31,35,39,38)(34,40,37,36)(1,3)(2,5)(4,8)(6,7)(9,10,15,13)(11,16,12,17)(14,18,22,21)(19,23,20,24)(25,28)(26,30)(27,29)(31,36)(32,33)(34,38)(35,37)(39,40)(9,12,15,11)(10,17,13,16)(14,20,22,19)(18,24,21,23)(25,29,32,26)(27,33,30,28)(31,37,39,34)(35,40,38,36)(1,3)(2,6)(4,8)(5,7)(9,13,15,10)(11,17,12,16)(14,18,22,21)(19,23,20,24)(25,30,32,27)(26,33,29,28)(31,35,39,38)(34,36,37,40)(1,2)(3,5)(4,7)(6,8)(9,14,15,22)(10,18,13,21)(11,19,12,20)(16,23,17,24)(25,31,32,39)(26,34,29,37)(27,35,30,38)(28,36,33,40)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.